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| author | Stephane Eranian <eranian@google.com> | 2020-11-26 20:09:22 +0900 |
|---|---|---|
| committer | Peter Zijlstra <peterz@infradead.org> | 2020-12-03 10:00:26 +0100 |
| commit | fc17db8aa4c53cbd2d5469bb0521ea0f0a6dbb27 (patch) | |
| tree | 4b0e517db83ad158f76421592fe2aa66507b5ac0 /drivers/gpu/drm/amd/amdgpu/amdgpu_test.c | |
| parent | 5debf02131227d39988e44adf5090fb796fa8466 (diff) | |
perf/x86/intel: Check PEBS status correctly
The kernel cannot disambiguate when 2+ PEBS counters overflow at the
same time. This is what the comment for this code suggests. However,
I see the comparison is done with the unfiltered p->status which is a
copy of IA32_PERF_GLOBAL_STATUS at the time of the sample. This
register contains more than the PEBS counter overflow bits. It also
includes many other bits which could also be set.
Signed-off-by: Namhyung Kim <namhyung@kernel.org>
Signed-off-by: Stephane Eranian <eranian@google.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: https://lkml.kernel.org/r/20201126110922.317681-2-namhyung@kernel.org
Diffstat (limited to 'drivers/gpu/drm/amd/amdgpu/amdgpu_test.c')
0 files changed, 0 insertions, 0 deletions